Pregnant woman Aya Ariyoshi, with her ripe, swollen belly, is driven by uncontrollable lust while gradually losing her dignity as a mother. Approaching her final month, she undergoes public training that transforms her into a sex slave, fully revealing the luxurious beauty of her darkened areolas, prominent stretch marks, and protruding navel. A beautiful yet tragic sight, hidden from her husband. Bound tightly with rope, subjected to cruel and degrading treatment that strips away her identity, she is pushed into deep masochism. Her alluring figure embodies an idealized beauty, making her suffering all the more striking.